International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B7. Istanbul 2004 
  
As for connectivity index, three types of algorithms such as 
alpha, gamma, and shimbel index were implemented, and level 
of circuity, as well as accessibility, was implemented in order to 
produce the results of OD (Origin-Destination)-styled matrix 
computation used in travel demand analysis in transportation 
geography. In both cases, high-resolution imagery is used in 
determination of user-defined arbitrary analysis zone or AOI 
(Area Of Interest), corresponding to TAZ (Traffic Analysis 
Zone) in GIS-T and real-time GIS database updating such as 
road boundary, centerline and other target features on the scene. 
By this approach, new quantitative information to 
characterize an urban transportation environment in a certain 
region can be easily obtained and utilized as meaningful 
indicators related to transportation planning process or urban 
planning, comparing with those results produced without high- 
resolution imageries 
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